How much sand do you need under pavers? Calculate exactly how much bedding sand and polymeric joint sand your paver project requires. No guesswork, no wasted trips to the supply yard.
Ready to calculate
Enter your project dimensions
Last updated March 31, 2026 by our expert review team
sq ft/bag
4×8"
sq ft/bag
6×6"
sq ft/bag
6×9"
sq ft/bag
12×12"
sq ft/bag
16×16"
Coverage per 50-lb bag of polymeric sand with standard 1/8" joints
Ruth Wairimu
Landscape Architect
Landscape architect with 9+ years of experience, AAK member, IFLA climate activist, and founder of Bloomwell.
See full profileHawkin
Certified Cost & Estimating Professional
AACE-certified estimator working with 20+ insulation companies including the two largest franchises in America.
See full profileUpdated March 2026
How we verify our calculatorsUse only ASTM C-33 coarse concrete sand for bedding. Test by squeezing a damp handful: if it holds its shape with angular grains, it's correct. Quikrete #1152 and Sakrete concrete sand meet C-33 specs.
Screed bedding sand using two 1-inch PVC pipes as rails on the compacted base. Pull a straight 2x4 across the pipes for a uniform 1-inch sand bed. Remove pipes and fill channels after each section.
Order 10 to 15% extra bedding sand for low spots, edge spillage, and base voids. For a 200 sq ft patio, order 0.8 to 0.9 tons instead of the calculated 0.7 tons.
Apply polymeric sand only to completely dry pavers with no rain forecast for 24 hours. Moisture activates polymers prematurely, creating hazy white residue that is very difficult to remove.
Sweep polymeric sand at a 45-degree angle to joint lines. Sweeping parallel pushes sand past the joints. Fill to within 1/8 inch of the chamfer, then blow off all surface residue before misting.
Alliance Gator Maxx G2 and Techniseal HP Nextgel are the top-rated polymeric sands. Mist with a gentle shower spray for 30 to 60 seconds per 50 sq ft section.
The calculator handles two distinct sand types with different formulas. For bedding sand, it multiplies your project area by the sand depth (1-1.5 inches) and converts to cubic yards and tons using ASTM C-33 concrete sand's standard weight of 1.35 tons per cubic yard (2,700 lbs). For general sand volume estimates, our sand calculator handles bulk orders, and our paver base calculator covers the crushed stone layer beneath the sand bed. For polymeric joint sand, the formula is area-based rather than volume-based: it divides your total square footage by the coverage rate for your selected paver size. Smaller pavers like 4x8 inch bricks have more joint length per square foot (about 30 sq ft per 50-lb bag), while 16x16 inch pavers have fewer joints (about 75 sq ft per bag). Both calculations include your waste factor because sand spillage during screeding and sweeping typically wastes 8-12% of material.
Formulas
Cubic Yards = Area × Depth ÷ 324
Tons = Cubic Yards × 1.35
Joint Sand Bags = Area ÷ Coverage Rate
What sand type for paver bedding?
Use ASTM C-33 coarse concrete sand with angular grains. Never substitute mason sand, play sand, or polymeric sand for bedding.
How deep should bedding sand be?
Spread 1.5 inches uncompacted, which compresses to about 1 inch. Going deeper causes uneven settling and trip hazards.
Do I really need polymeric sand?
Polymeric sand locks pavers together, prevents weeds, resists ants, and stops joint washout. Regular sand washes out in 6 to 12 months.
Which polymeric sand brand is best?
Techniseal HP Nextgel and Alliance Gator Maxx G2 top pro ratings. Budget option: Quikrete PowerLoc at $20/bag vs $30-35 for premium.
How much bedding sand per square foot?
At 1-inch depth, about 0.31 cubic yards per 100 sq ft (0.42 tons). For 200 sq ft, plan on roughly 0.94 tons with 10% waste.
Can I apply polymeric sand in cold or wet weather?
No. It requires dry conditions above 32°F. Damp pavers cause premature activation and white haze. Wait for 24 hours of dry weather.
How do I calculate joint sand separately?
Joint sand depends on paver size, not depth. Coverage ranges from 30 sq ft/bag for 4x8 brick pavers to 75 sq ft/bag for 16x16 pavers.
How often does polymeric sand need replacing?
Quality brands last 8 to 10 years in moderate climates. Power washing and heavy salt reduce lifespan to 3 to 5 years.
192 sq ft | 6x9" pavers | 0.8 tons bedding + 5 bags polymeric | $188 total
Tip: Screed in 2 hours using PVC pipe rails. Complete joint sand application in 45 minutes.
100 sq ft | 4x8" brick pavers | 0.62 tons bedding + 4 bags polymeric | $162 total
Tip: Narrower width means careful screeding in 4-foot sections for a uniform sand bed.
L-shaped | 12x12" pavers | 1.66 tons bedding + 8 bags polymeric | $330 total
Tip: Large paver size reduced joint sand needs by 50% compared to standard brick pavers.
Using the wrong sand type for bedding
Mason sand, play sand, and all-purpose sand are too fine and round. They shift under foot traffic and cause lippage. Only ASTM C-33 concrete sand has the right angular grain shape.
Applying polymeric sand to wet pavers
Even light moisture activates polymer binders on contact, creating permanent white haze. Wait for 24 hours of dry weather before application.
Over-watering polymeric sand during activation
Too much water flushes binders out of joints and onto surfaces. Use a gentle shower spray for 30 to 60 seconds per 50 sq ft. Sand should darken but not puddle.
Screeding sand bed too thick
Sand beds over 1.5 inches cause uneven settling. Fix the base layer with crushed stone rather than adding extra sand.
Not blowing off excess before watering
Any polymeric sand left on paver faces hardens into permanent haze when watered. Use a leaf blower to remove every grain before misting.
Important Disclaimer
These estimates are for planning purposes only. Actual costs vary by location, material availability, and project complexity. Always get at least 3 local quotes. This calculator does not replace professional advice.